Welding installation process of rotor partition plates of rotary air preheater

Abstract

The invention discloses a welding installation process of rotor partition plates of a rotary air preheater, and belongs to the technical field of installation of rotary air preheater rotors. The process includes the steps that (1) two partition plates symmetrically located on the two sides of a center cylinder in a first group of partition plates are welded to the wall of the center cylinder, andthe other two partition plates symmetrically located on the two sides of the center cylinder in the first group of partition plates are welded to the wall of the center cylinder; (2) each partition plate in a second group of partition plates is located between two adjacent partition plates in the first group of partition plates, and the second group of partition plates are welded according to thewelding sequence of the first group of partition plates; (3) N groups of partition plates located between the second group of partition plates and the first group of partition plates which are adjacent clockwise are uniformly distributed clockwise in the circumferential direction of the center cylinder; (4) N groups of partition plates located between the first group of partition plates and the second group of partition plates which are adjacent clockwise are uniformly distributed anticlockwise in the circumferential direction of the center cylinder. By means of the process, overall symmetry welding of the partition plates can be realized, and welding deformation in the prior art is reduced to the maximum.

Description

technical field [0001] The invention relates to the technical field of installation of a rotary air preheater rotor, in particular to a welding and installation process for a rotor partition of a rotary air preheater. Background technique [0002] With the development of electric power technology and the proposal of the national energy saving and emission reduction policy, the rotary air preheater with compact structure and light weight has been widely used in large capacity units in my country. The rotor of the rotary air preheater is mainly composed of a central tube, a fan The fan-shaped compartment is composed of two adjacent partitions that are evenly distributed radially around the circumference of the central cylinder. Due to the large size of the rotary air preheater rotor, it is usually necessary to weld and install the air preheater rotor on site. In the prior art, the installation of the rotor compartment of the rotary air preheater adopts a sequential installatio...

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Problems solved by technology

[0003] However, it is difficult to control the welding deformation of the partition plate of the rotary air preheater rotor by using the existing technology, so that the cylindrical rotor is deformed into an elliptical cylindrical shape, and the rotor is not parallel to produce friction when the rotor is running, and the shroud deviates; The adjustment accuracy of various sealing gaps of the rotary air preheater is reduced, and the air leakage is increased, which seriously affects the output and economic operation of the unit; and the welding deformation of the compartment partition makes it difficult to install the heat exchange elements and increase the construction period; it is difficult to meet the requirements of the rotary air preheater. Installation Quality Requirements for Preheater Rotor

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